This document discusses various types of compaction equipment used in road construction. It describes road rollers, sheepsfoot rollers, pneumatic tyred rollers, vibratory rollers, and frog rammers. Road rollers are used to compact earthworks, soil stabilization, granular bases, and asphalt surfaces. Sheepsfoot rollers are suitable for compacting cohesive soils, especially when moisture content is high. Pneumatic tyred rollers are used to compact non-plastic silts and silty soils. Vibratory rollers can compact both cohesive and non-cohesive materials and are commonly used to compact pavement layers, subgrades, granular bases, and asphalt courses

1. By
Rahul 11205190
Roll no. A21
EQUIPMENTS FOR
COMPACTION

2. EQUIPMENTS FOR COMPACTION
 Road Rollers
 Sheepsfoot Rollers
 Pneumatic Tyred Rollers
 Vibratory Rollers
 Frog Rammer

3. Road Rollers
 Three Wheeled Road Roller
The diameter of front roll is around 105 cm, its
width being around 100 cm , and it gives a load of
around 35-40 kg/cm width.
The diameter of rear roll is around 145 cm, its width
being around 50 cm , and it gives a load of around
70-80 kg/cm width.

4. Road Rollers
Application
• Earthwork rolling
• Soil Stabilisation
• Rolling granular
bases (WBM,
murram etc.)
• Surface dressing
, bituminous
macadam
• Break- down
rolling of
asphaltic
concrete

5. Sheepsfoot Rollers
 Sheepsfoot rollers consist of hollow circular drums
of steel 1.2- 1.5m long and 0.9- 1.2m diameter
 The weight of a single drum is in the range 1200-
1800 kg when empty and 2200-2800 kg when
ballasted.
 A tractor of 45 HP can pull a single drum and one of
70-90 HP can pull double drum.
 A speed of 4 kmph is common.
 Self driven or tractor driven
 Suitable on cohesive soils specially when water
content is on the higher side.

6. Sheepsfoot Rollers
Application
• Rolling cohesive
soil
 The Number of
passes of rollers
depends upon
the types of soil,
moisture content
and density
desired .
 Generally 8-16
passes are
needed.

7. Pneumatic Tyred Rollers
 Pneumatic tyred rollers consists of a box mounted
over two axles, the rear axle having one more
wheel than the front axles so arranged that they
are located in plan in between the rear wheels.
 Generally there are four wheels in the front and
five in the rear.
 Weights in the range 12- 45 tonnes are common.
 The layer thickness should be 10-20 cm when
compacting.
 The tyre pressure should be a minimum of 0.5
MN/m^2
 The number of passes required is about 8-12 .
 One pneumatic roller is generally required for an
output of 25 cu m /hour.

8. Pneumatic Tyred Rollers
Applicatio
n
• Rolling
non-
plastic
silts and
silty soils
• Intermedi
ate rolling
of
asphaltic
concrete

9.  Vibratory rollers have become very popular in
highway engineering applications in recent years,
with the growing need to compact pavement layers
and subgrade to a high degree of densification .
 Both cohesive and non cohesive materials can be
compacted by vibratory rollers.
 For compacting soils and granular layers , a
frequency of 1500-2500 VPM and an amplitude of
0.8-1.5 mm are recommended.
 For bituminous courses , a frequency of 2000-
3000 VPM and an amplitude of 0.4-0.8 mm are
recommended.
Vibratory Rollers

10. Vibratory Rollers
Types of Vibratory rollers
 Combination rollers
Combination of two
different types of road
rollers.
 Hand Operated
vibratory rollers
 Vibratory plate
compactors
Applications
• Compacting sand and
cohesionless soils
• Compacting all types of soils
for obtaining high densities
• Compacting granular bases
and sub-bases to obtain high
densities
• Compacting bituminous
bases and surfaces to obtain
high degree of compaction

11. Vibratory Rollers

12. Frog Rammer
 Frog Rammer are used for compacting
cohesionless soils and soils in inaccessible
and restricted locations where ordinary rollers
cannot work. They are worked by pneumatic
system or by a diesel engine. The weight
varies from 30 kg to one tonne.

13. Frog Rammer

14. Reference
Highway Engineering BY
Dr. L. R. Kadyali and Dr. N.B. Lal
Thank you